JP4830799B2 - Adsorption module - Google Patents

Description

The present invention relates to an adsorption module , and is suitable for application to an adsorber that evaporates a refrigerant by using, for example, an action in which an adsorbent adsorbs a gas-phase refrigerant and exhibits a refrigerating capacity by the latent heat of vaporization.

  Conventionally, this type of adsorber has an adsorption heat exchanger filled with an adsorbent and a heat exchanger in which an adsorbed medium adsorbed / desorbed evaporates / condenses. Some of them are accommodated in a vacuum vessel constituting the outer frame of the vessel (see Patent Document 1).

  In the technique disclosed in Patent Literature 1, a copper powder or the like sintered in an adsorption heat exchanger is used as a heat transfer promoting material. In this technique, the copper powder and the adsorbent are mixed and sintered, and the heat transfer tube through which the heat exchange medium flows is integrally encapsulated.

In addition, the adsorption heat exchanger constituting the adsorber and the heat exchanger are individually manufactured, and then the adsorption heat exchanger and the heat exchanger manufactured individually are accommodated inside the container in an airtight manner. It is attached.
JP-A-4-148194

  In the prior art according to Patent Document 1 described above, a sintered body of copper powder is used as a heat transfer fin, so that the contact area with the adsorbent filled in the voids including the pores in the heat transfer fin is increased. The characteristics can be improved.

  However, in practice, the above-described prior art has a problem in that although the heat transfer characteristics are improved, the cooling performance and the coefficient of performance COP may be lowered.

  That is, when the amount of copper powder is large, that is, when the porosity of the heat transfer fin filled with the adsorbent is low, the heat transfer characteristics are improved by the expansion of the contact area with the adsorbent. Since the amount of adsorbent that can be filled in the voids decreases, there is a region that causes a decrease in cooling performance and coefficient of performance COP. On the other hand, if the amount of copper powder is reduced and the porosity is increased, the amount of adsorbent that can be filled increases, but the heat transfer characteristics deteriorate due to the decrease in the contact area with the adsorbent, so that the cooling performance and There is a concern that the coefficient of performance COP will decrease.

The present invention has been made in view of such circumstances, and the object thereof is to provide a porous heat transfer body around the heat medium tube, and an adsorbent filled in a void portion of the porous heat transfer body. It is an object of the present invention to provide an adsorption module capable of improving heat transfer characteristics and maintaining a high performance and coefficient of performance COP at all times.

  In order to achieve the above object, the present invention employs the following technical means.

That is, in the first aspect of the present invention, the porous medium has a plurality of heat medium tubes (21) through which the heat exchange medium flows, and has pores (23a) in the peripheral portion (22) of the heat medium tubes (21). An adsorption module (1) provided with a heat transfer body (23) and an adsorbent (24), wherein the porous heat transfer body (23) is any of powder, particles, and fibers The metal powder (23b) is formed by metal bonding to the heat medium pipe (21) by sintering, and the adsorbent (24) is contained in the pores (23a) formed in the porous heat transfer body (23). The thickness (L) of the adsorbent packed layer in which the adsorbent (249) is filled in the peripheral portion (22) of the heat medium pipe (21) is set in the range of 0.5 mm to 6 mm. , the heat medium pipe (21), a metal bonded porous heat transfer member to the peripheral portion (22) of the heat medium pipe (21) and (23) The void portion includes pores (23a). The porosity Mo of the void portion is the weight of the metal powder (23b) filled in the peripheral portion (22) as Mg, and the metal powder (23b) When the filling volume of the filled peripheral part (22) is Fv and the density of the metal powder (23b) is ρ, Mo = (1-Mg / (Fv × ρ)), and the porosity Mo is It is characterized by being set in the range of 70% to 95%.

According to this, since the thickness (L) of the adsorbent packed layer, that is, the penetration depth (r2) is set in the range of 0.5 mm to 6 mm, it is possible to provide a higher performance adsorption module (1). it can. According to this, by setting the porosity Mo in the range of 70% to 95%, the amount of the metal powder (23b) is optimized, so that the heat transfer characteristics can be improved and the performance and coefficient of performance COP are always An adsorption module (1) maintained in a high state can be provided.

Above adsorption module (1) is provided with the adsorbed medium passage which the adsorption medium flows (25), the adsorbed medium passage (25) is arranged between the heat medium pipe (21).

  In the case where the porous heat transfer body (23) and the adsorbent (24) are provided in the peripheral portion (22) of the heat medium pipe (21), the porous heat transfer body (23) sinters the metal powder (23b). By using a so-called heat transfer fin as a body, the contact area with the adsorbent (24) filled in the heat transfer fin is increased, and the heat transfer characteristics are improved. However, depending on the thickness of the peripheral portion (22) of the heat medium pipe (21) in the porous heat transfer body (23), the adsorbent medium when the adsorbent (24) adsorbs / desorbs the adsorbed medium. Due to the diffusion resistance, the adsorption / desorption rate of the adsorbent (24) may not increase as intended, and as a result, the cooling performance may not be improved.

On the other hand , in the first aspect of the present invention, since the adsorbed medium passage (25) through which the adsorbed medium flows is provided between the heat medium pipes (21), the inside of the porous heat transfer body (23). This makes it easier for the adsorbed medium to penetrate into the adsorbent (24), and the diffusion resistance of the adsorbed medium can be reduced.

Moreover, as arrangement | positioning of the to- be-adsorbed medium channel | path (25) between the said heat-medium pipe | tubes (21), from the internal peripheral surface of an adsorbed-medium medium channel | path (25) to the outer peripheral surface of an adjacent heat medium pipe | tube (21). The distance is the penetration depth (r2) at which the adsorbed medium penetrates toward the heat medium pipe (21), and the distance from the heat medium pipe (21) in the thickness of the adsorbent packed layer is the heat transfer distance (r1). as a penetration depth (r2), so that the the heat transfer distance (r1) almost equal, are arranged the adsorbed medium passage (25) between the heat medium pipe (21).

  According to this, the adsorbed medium passage (25) is placed between the heat medium pipes (21) so that the penetration depth (r2) related to the adsorption and desorption rates is substantially equal to the heat transfer distance (r1). Since it is disposed, it is possible to provide a high-performance adsorption module (1) having excellent heat transfer characteristics and low diffusion resistance of the medium to be adsorbed.

Also, the heat medium pipe (21) in the case is a flat shape, as in the embodiment described in claim 2, the heat medium pipe (121) the distance the heat transfer distance from the long sides of the flat cross section (r1) And the penetration depth (r2) at which the adsorbed medium penetrates from the inner peripheral surface of the adsorbed medium passage (125) toward the heat medium pipe (121) and the heat transfer distance (r1) are substantially equal. In addition, it is preferable to arrange the adsorbed medium passageway (125) between the heat medium pipes (121).

  According to this, even in the case of a flat-shaped heat medium pipe (121), the heat medium pipe is such that the penetration depth (r2) related to the adsorption and desorption speed is substantially equal to the heat transfer distance (r1). The adsorbed medium passageway (125) can be disposed between (121).

According to a third aspect of the present invention, the adsorbed medium passage (25) is arranged in parallel to the heat medium pipe (21), and the adsorbed medium can flow in at least one direction. .

  According to this, the adsorbed medium passage (25) is placed between the heat medium pipes (21) so that the penetration depth (r2) related to the adsorption and desorption rates is substantially equal to the heat transfer distance (r1). Easy to arrange.

In the invention according to claim 4 , the adsorption module (1) includes at least a casing (3) capable of holding the porous heat transfer body (23) in a vacuum, and the casing (3) is disposed inside. The adsorbed medium is enclosed, and the external evaporator and condenser are connected to the adsorbed medium so that the adsorbed medium can be circulated. The adsorbed medium flows from the evaporator side during adsorption and the condenser side during desorption. It is characterized in that the adsorbed medium flows out.

  According to this, since the adsorbed medium is guided to the separately provided evaporator and condenser at the time of adsorption and desorption, the evaporator and the condenser are wasted at the time of desorption and adsorption. Does not produce energy.

In the invention according to claim 5 , the metal powder (23b) of the porous heat transfer body (23) is made of copper or a copper alloy, and the heat medium pipe (21) is made of copper or a copper alloy. Features.

  According to this, since the porous heat transfer body (23) excellent in heat transfer characteristics and the heat medium pipe (21) are sintered and bonded, they can be joined not only in contact but also in metal. Heat improvement can be achieved effectively.

In the invention described in claim 6 , the housing (3) has an internal housing space defined by a plurality of members (31, 32, 33, 34, 35) brazed to each other by a brazing material. The metal powder (23b) is characterized in that the sintering temperature is the same as the brazing temperature of the brazing material.

  According to this, the joining of the structural members such as the casing constituting the adsorption module with the brazing material and the formation of the porous heat transfer body (23) by the sintering of the metal powder (23b) are performed in the furnace once. Since it can be carried out simultaneously by heating at the application temperature, it is possible to provide an adsorption module capable of achieving excellent productivity.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
The adsorption module according to the first embodiment of the present invention will be described with reference to FIGS. 1A and 1B are views showing an adsorption heat exchanger according to the present embodiment, in which FIG. 1A is a cross-sectional view, and FIG. 1B is a cross-sectional view as seen from IB in FIG. FIG. 2 is an enlarged view of FIG. FIG. 3 is a schematic cross-sectional view showing the adsorbent packed layer in FIG. FIG. 4 is an external view showing the adsorption module of the present embodiment. FIG. 5 is a cross-sectional view seen from V in FIG. FIG. 6 is a cross-sectional view taken along VI in FIG. FIG. 7 is a characteristic diagram showing the relationship between the thickness L of the adsorbent packed bed and the cooling performance per unit volume. FIG. 8 is a characteristic diagram showing the relationship between the thickness L of the adsorbent packed layer and the adsorption capacity.

  FIG. 9 is a schematic diagram for explaining the void ratio in the void portion including the pores in the adsorbent packed bed in FIG. FIG. 10 is a characteristic diagram showing the relationship between the porosity and the packing density of the adsorbent. FIG. 11 is a diagram illustrating the relationship between the porosity and the cooling performance, and is a characteristic diagram illustrating an example when the thickness L of the adsorbent packed layer is 2 mm. FIG. 12 is a diagram for explaining the relationship between the void ratio and the coefficient of performance COP, and is a characteristic diagram showing an example when the thickness L of the adsorbent packed layer is 2 mm. FIG. 13 is a diagram for explaining the relationship between the porosity and the cooling performance, and is a characteristic diagram showing another example when the thickness L of the adsorbent packed layer is 4 mm. FIG. 14 is a diagram for explaining the relationship between the void ratio and the coefficient of performance COP, and is a characteristic diagram showing another example when the thickness L of the adsorbent packed layer is 4 mm. FIG. 15 is a flowchart showing the manufacturing process for the manufacturing method of the adsorption module of this embodiment.

  The adsorption module 1 shown in FIG. 4 is an adsorption type utilizing the fact that the adsorbent contained therein evaporates the refrigerant using the action of adsorbing the gas-phase refrigerant (water vapor) and exhibits the refrigerating capacity by the latent heat of vaporization. It is used for a refrigerator and can also be applied to an air conditioner for vehicles. As shown in FIGS. 5 and 6, the adsorption module 1 includes an adsorption heat exchanger 2 in a casing 3 constituting a housing. The adsorption heat exchanger 2 includes a heat medium pipe 21 through which a heat exchange medium (refrigerant) flows, and a porous heat transfer body 23 having pores and an adsorbent 24 in a peripheral portion 22 of the heat medium pipe 21. Is provided.

  Specifically, as shown in FIGS. 1 and 3, the adsorption heat exchanger 2 has a heat medium tube 21 made of copper or a copper alloy (copper in this embodiment) and a porous body having pores 23a. It has a mass heat transfer body 23 and an adsorbent 24 filled in the pores 23a.

  The porous heat transfer body 23 is a sintered body in which the metal powder 23b having excellent thermal conductivity is heated and sintered and bonded without melting. The metal powder 23b uses copper or a copper alloy (in this embodiment, copper). For example, the copper powder is powdery, particulate, or fibrous (in this embodiment, fibrous). What is formed may be sufficient.

  Such a porous heat transfer body 23, that is, a sintered body obtained by sintering and bonding the metal powder 23b, is a fine sintered fin having pores 23a (hereinafter referred to as a porous sintered fin) as shown in FIG. Form. The pores 23a are fine pores that are matched so as to be able to be filled with the adsorbent 24 having a fine particle diameter compared to the metal powder 23b. The porous heat transfer body 23 is sinter-bonded to the periphery of the heat medium pipe 21 made of copper.

  In addition, since the porous heat transfer body 23 having the pores 23a and the heat medium pipe 21 are bonded to each other by sintering, they are bonded metallically in addition to the pores 23a formed in the porous heat transfer body 23. A void defined by the interface between the porous heat transfer body 23 and the heat medium pipe 21 is also generated. These voids and pores 24a correspond to the voids described in the claims. The void and the pore 24a can be rephrased as a void portion including the pore 24a.

  Further, the porous heat transfer body 23 is formed by the peripheral portions 22 of the plurality of cylindrical heat medium pipes 21 so that the whole of the porous heat transfer body 23 extends in one direction, and has a cylindrical shape as a whole.

  The adsorbent 24 is formed into a large number of fine particles, and is made of, for example, silica gel, zeolite, activated carbon, activated alumina, or the like. The adsorbent 24 is filled in the pores 23 a of the porous heat transfer body 23.

  Further, in the present embodiment, an adsorbed medium passage 25 through which an adsorbed medium (hereinafter, water vapor) flows is disposed between the heat medium tubes 21. The cross-sectional shape of the adsorbed medium passage 25 is a circle in this embodiment, but may be any of a circle, an ellipse, and a rectangle. In the present embodiment, the adsorbed medium passage 25 is disposed in a region surrounded by the three heat medium pipes 21 in the drawing, but is not limited to three, and a plurality of heat such as four or five. It may be arranged in a region surrounded by the medium tube 21.

  This adsorbed medium passage 25 plays a role of promptly penetrating into the porous heat transfer body 23 in the peripheral portion 22 of the heat medium pipe 21 through water vapor from the evaporator in FIG. Further, at the time of desorption, the water vapor discharged from the porous heat transfer body 23 in the peripheral portion 22 of the heat medium pipe 21 plays a role of promptly leading to the condenser in FIG.

  Here, the porous heat transfer body 23 in the peripheral portion 22 of the heat medium pipe 21 is referred to as an adsorbent packed layer. This adsorbent packed layer corresponds to the thickness L (see FIG. 3) of the porous sintered fin that is sintered and bonded at the peripheral portion 22 of the heat medium tube 21.

  In setting the thickness L of the adsorbent packed bed, as shown in FIGS. 2 and 3, the penetration depth r2 of water vapor toward the heat medium pipe 21 and the distance from the heat medium pipe 21 (hereinafter referred to as heat transfer). It is preferable to arrange the adsorbed medium passage 25 between the heat medium pipes 21 so that the distance r1 is substantially equal. In this embodiment, the penetration depth r2 is a distance from the inner peripheral surface of the adsorption medium passage 25 to the outer peripheral surface of the heat medium pipe 21.

  As described above, by arranging the adsorbed medium passage 25 between the heat medium pipes 21 so that the penetration depth r2 related to the adsorption and desorption speed is substantially equal to the heat transfer distance r1, It is possible to provide a high-performance adsorption heat exchanger that has low diffusion resistance and excellent heat transfer characteristics, and can shorten the time required for adsorption and desorption.

  Furthermore, in order to optimize the thickness L of the adsorbent packed bed, the relationship between the thickness L of the adsorbent packed bed and the cooling performance will be described with reference to FIGS. FIG. 7 shows the thickness L of the adsorbent-packed layer (porous sintered fin) on the horizontal axis and the cooling performance per unit volume on the vertical axis. This cooling performance has a maximum performance of 1. It is expressed as a cooling capacity ratio. The characteristic diagram shown in FIG. 7 is obtained by calculating the cooling capacity per unit volume from the experimental result (see FIG. 8) of the adsorption rate (η / τ).

  FIG. 8 is a characteristic diagram showing the adsorption rate (η / τ) obtained by experiment for each thickness L using the thickness L of the adsorbent packed layer as a parameter. The vertical axis represents adsorption efficiency and the horizontal axis represents adsorption. Time is shown. As shown in FIG. 8, when the thickness L of the adsorbent packed layer is increased, the adsorption rate (η / τ) decreases. In other words, the adsorption rate (η / τ) increases as the thickness L of the adsorbent packed layer decreases.

  On the other hand, when converted to the cooling capacity ratio per unit volume in FIG. 7, the adsorbent filling amount increases by increasing the thickness L of the adsorbent packed layer. This is because, for example, as in the comparative example of L = 2 mm and L6 mm in FIG. 8, the volume of the heat medium pipe 21 decreases as the thickness L of the adsorbent packed layer increases. However, as is apparent from the characteristic diagram of FIG. 8, the adsorption rate (η / τ) is slow, and as a result, when the thickness L increases to some extent, the cooling capacity decreases as a result. That is, since the refrigeration capacity is proportional to the adsorbent weight and the adsorption rate (η / τ), there exists the thickness L of the adsorbent packed layer that maximizes the cooling capacity per unit volume. As shown in FIG. 7, the thickness L of the adsorbent packed layer that maximizes the cooling capacity per unit volume is L = 2 mm.

  The thickness L of the adsorbent packed layer having such a relationship is preferably set in a range of 0.5 mm to 6 mm as shown in FIG. Thereby, the performance from the maximum performance to 70% can be secured.

  More desirably, the thickness L of the adsorbent packed layer is preferably set in a range of 1 mm to 4 mm. As a result, the performance from the maximum performance to 85% can be secured, so that a reduction of about 15% with respect to the maximum performance can be suppressed, and a performance close to the maximum performance can be obtained.

  In setting the thickness L of the adsorbent packed bed, it is assumed that the adsorbed medium passage 25 is disposed between the heat medium pipes 21 so that the penetration depth r2 and the heat transfer distance r1 are substantially equal. However, the penetration depth r2 and the heat transfer distance r1 are about 2 mm between the penetration depth r2 and the heat transfer distance r1 if the thickness L of the adsorbent packed layer is in the range of 0.5 mm to 6 mm. There may be differences. By setting the thickness L of the adsorbent packed layer to an optimal value included in the optimal range, such as being included in the range of 0.5 mm to 6 mm, the cooling performance may cause a significant problem. There is no.

  In the adsorption adsorption heat exchanger 2 in which the thickness L of the adsorbent packed layer is optimized as described above, the inventors attached the metal powder 23b and the adsorbent 24 and changed physical properties such as bulk density. Efforts have been made to verify the cooling performance of this product through experiments. In addition, as an evaluation item of the cooling performance evaluated in the verification experiment, the coefficient of performance COP and the like were evaluated in addition to the cooling capacity ratio per unit volume.

  Here, the cooling capacity (cooling performance) Q is expressed by Equation 1.

(Equation 1)
Cooling capacity Q = G × ΔC × ΔH × η / τ
In Equation 1,
G is the amount of adsorbent 24 (kg)
ΔC is an adsorption characteristic of the adsorbent 24 to the adsorbed medium (water vapor) (hereinafter, water adsorption characteristic) (kg / kg).
ΔH is latent heat (kJ / kg)
η is the adsorption efficiency (the proportion of adsorbent adsorbed under the operating conditions)
τ is the switching time,
η / τ is the aforementioned adsorption rate.

  Further, the coefficient of performance COP is expressed by Equation 2.

(Equation 2)
Coefficient of performance COP = Q / (Q + Qh)
In Equation 2,
Qh is a heat flow (kW) required to change the temperature of the component parts such as the adsorption heat exchanger 2 and the casing 3 constituting the adsorption module 1, specifically, the adsorbent 24, the porous heat transfer The heat capacity of the body 23, the heat medium pipe 21, and the housing 3.

  According to the above experimental results, it was confirmed that the adsorbent packed layer thickness L that maximizes the cooling capacity ratio surely exists within the range of the thickness L of 0.5 mm to 6 mm. However, regardless of the size of the adsorbent packed layer thickness L, the cooling capacity ratio depends on the amount of the porous heat transfer body (porous sintered fin) 23, that is, the amount of the metal powder 23b sintered as the sintered body. And the coefficient of performance COP was found to change relatively significantly. For example, even when the adsorbent packed layer thickness L is 2 mm, which is the maximum performance in the characteristic diagram of FIG. 8, the cooling capacity ratio and the coefficient of performance COP are relatively different depending on the amount of the metal powder 23b.

  Therefore, the inventors changed (1) the adsorbent that can be filled into the void portion by changing the void portion formed by sintering and bonding the metal powder 23b as pores of the sintered body depending on the amount of the metal powder 23b. When the amount of 24 is different, and (2) the state of the void portion, for example, when the porosity Mo changes as the state index, the heat transfer area inside the porous heat transfer body 23 (pore 23a) in contact with the adsorbent 24 is Different studies have been conducted with a focus on the different thermal characteristics.

  Here, the porosity Mo described above is expressed by Equation 3.

(Equation 3)
Porosity Mo = (1-Mg / (Fv × ρ))
In Equation 3,
Mg is the amount (kg) of the metal powder 23b filled to form the porous heat transfer body 23
Fv is the space volume filled with the metal powder 23b (hereinafter referred to as filling volume) (m ³ )
ρ is the density (kg / m ³ ) of the metal powder 23b. For example, as shown in FIG. 9, the metal powder 23b filled in the peripheral portion 22 of the cylindrical heat medium pipe 21 is Mg, and the filling volume of the peripheral portion 22 (the cylindrical shape indicated by the two-dot chain line in the figure). The volume range is Fv. The filling volume is not limited to the peripheral portion 22 of the heat medium tube 21, and each peripheral portion 22 of the heat medium tube 21 in the housing 3 in a state where the heat medium tubes 21 are arranged in the housing 3. The total filling volume may be the filling volume Fv for determining the porosity Mo.

  First, since the cooling capacity Q expressed by Equation 1 is proportional to the amount G of the adsorbent 24 and the adsorption rate (η / τ), increasing the amount of the adsorbent 24 and the adsorption rate (η / τ) ) Is improved when at least one of the following is established.

  In addition, the coefficient of performance COP expressed by Equation 2 is the cooling capacity Q, the heat capacity (weight) of the adsorbent 24, the porous heat transfer body 23, that is, the metal powder 23b formed on the sintered body by sintering, and the like. Are relatively affected.

  Further, the amount of the adsorbent 24 and the amount of the metal powder 23b affecting the cooling capacity Q and the coefficient of performance COP are as shown in the characteristic diagram showing the relationship between the porosity Mo and the packing density of the adsorbent 24 shown in FIG. Corresponding to the porosity Mo determined based on the amount of the metal powder 23b, the maximum amount G that can be filled with the adsorbent 24 is determined. Therefore, it can be said that the porosity Mo represented by Formula 3 can be related to the cooling capacity Q and the coefficient of performance COP.

  FIG. 10 is a characteristic diagram showing the relationship between the porosity Mo and the packing density of the adsorbent 24. The horizontal axis shows the porosity Mo, the vertical axis shows the packing density of the adsorbent 24, and Two examples of different bulk densities A and B with different bulk densities A and B of physical properties are shown. The packing density of the adsorbent 24 shown on the vertical axis is the maximum packing density when the adsorbent 24 having the respective bulk densities A and B is filled. In this example, the bulk densities A and B were 0.7 g / cc and 0.5 g / cc, respectively. The range where the bulk density B is equal to or higher than the bulk density A and the bulk density A is equal to or lower than the bulk density range of 0.5 g / cc to 0.7 g / cc. Because it is within.

  As shown in FIG. 10, in the case of bulk density A, for example, in a region where the metal powder (copper powder) 23b is large, that is, in a region where the porosity Mo is low, the sintered body of the copper powder 23b is made of porous sintered fins (porous transmission The heat transfer characteristics are improved by expanding the contact area with the adsorbent 24 filled in the porous sintered fin, but the void portion Mo can be filled because the porosity Mo is low. The amount of adsorbent 24 decreases. In such a low porosity Mo region, the cooling capacity is reduced, and the rate of heat dissipation is increased, leading to a decrease in the coefficient of performance COP. On the other hand, in the region where the amount of the metal powder 23b is reduced and the porosity Mo can be increased, the amount of the adsorbent 24 that can be filled increases. However, the heat transfer characteristics are reduced due to the reduction of the contact area with the adsorbent 24. Since it decreases, there is a concern that the cooling capacity and the coefficient of performance COP will decrease.

  Next, in order to optimize the porosity Mo, the relationship between the porosity Mo and the cooling capacity ratio, and the relationship between the porosity Mo and the coefficient of performance COP will be described with reference to FIGS. 11 and 13 and FIGS. The characteristic diagram showing the porosity Mo and the cooling capacity ratio in FIG. 11 and the characteristic diagram showing the relationship between the porosity Mo and the coefficient of performance COP in FIG. 12 are obtained when the porosity Mo is not considered, as in the characteristic diagram in FIG. In the case where the adsorbent packed layer thickness L indicating an example in which the cooling capacity ratio is maximized is 2 mm, the cooling capacity ratio and the coefficient of performance COP related to the porosity Mo are calculated. Further, the characteristic diagram showing the porosity Mo and the cooling capacity ratio in FIG. 13 and the characteristic diagram showing the relationship between the porosity Mo and the coefficient of performance COP in FIG. 14 are not the maximum performance as shown in the characteristic diagram in FIG. Cooling capacity ratio and coefficient of performance related to the porosity Mo when the adsorbent packed layer thickness L is 4 mm, which is another example in the range of the adsorbent packed layer thickness L that satisfies the cooling capacity ratio COP is calculated.

  In optimizing the porosity Mo, the allowable cooling capacity ratio was set to 85% or more of the maximum cooling capacity. Further, the acceptable coefficient of performance COP was set to 0.5 or more. Thereby, since the cooling capacity from the maximum performance to 85% can be ensured, a reduction of about 15% with respect to the maximum performance can be suppressed, and a cooling capacity close to the maximum performance can be obtained. Moreover, since the allowable coefficient of performance COP is 0.5 or more, it is possible to operate with less waste heat from the waste heat source of the adsorbed medium (water vapor). Furthermore, since the allowable coefficient of performance COP is 0.5 or more, even if there is a case where it is desired to operate the adsorption heat exchanger 2 in a region where the heat dissipation performance is small, the adsorption heat exchanger 2 should be operated without increasing its size. Can do.

  As described above, when the allowable cooling capacity ratio is 85% or more of the maximum cooling capacity, the range in which the thickness L of the adsorbent packed layer is optimized is in the range of 1 mm to 4 mm.

  As shown in FIG. 11, in the characteristic diagram of the porosity Mo and the cooling capacity ratio when the adsorbent packed layer thickness L is 2 mm, the bulk density of the adsorbent 24 is either bulk density A or bulk density B. Even so, the cooling capacity ratio increases (improves) almost in proportion to the increase in the porosity Mo. The cooling capacity at which the increased porosity Mo reaches 90% is maximized, and in a region where the subsequent porosity Mo exceeds 95%, the cooling capacity is rapidly lowered as the porosity Mo increases.

  Further, when the bulk densities A and B of the adsorbent 24 are compared with each other, the cooling capacity ratio of the bulk density B having a smaller bulk density is almost the entire range of the porosity Mo, and the cooling capacity ratio of the bulk density A is larger. It is inferior.

  Thus, even in the case of the bulk density B having a small bulk density, in order to ensure a performance of 85% or more with respect to the maximum performance, the porosity Mo is 70% to 95% as shown in FIG. % Is preferably set within the range of%.

  Further, as shown in FIG. 12, in the characteristic diagram of the void ratio Mo and the coefficient of performance COP when the adsorbent packed layer thickness L is 2 mm, the void density A and the bulk density B can be measured regardless of the void density. The coefficient of performance COP increases (improves) almost in proportion to the increase in the rate Mo. The coefficient of performance COP at which the increased porosity Mo reaches 95% is maximized, and in the region where the porosity Mo thereafter exceeds 98%, the coefficient of performance COP rapidly decreases as the porosity Mo increases.

  Further, when comparing the densities A and B, the coefficient of performance COP of the bulk density B having a small bulk density is inferior to the coefficient of performance COP of the bulk density A in almost the entire range of the porosity Mo.

  Thus, even in the case of the bulk density B having a small bulk density, in order to ensure a coefficient of performance COP of 0.5 or more, the porosity Mo is set to 60% or more as shown in FIG. It is preferable.

  Furthermore, in order to maintain a state where the cooling capacity ratio and the coefficient of performance COP are high, the porosity Mo is preferably set within a range of 70% to 95%.

  Next, as shown in FIG. 13, in the characteristic diagram of the porosity Mo and the cooling capacity ratio when the adsorbent packed layer thickness L is 4 mm, the bulk density A, the bulk density B, The cooling capacity ratio increases (improves) almost in proportion to the increase in the porosity Mo. The cooling capacity at which the increased porosity Mo reaches 80% is maximized, and in the region where the subsequent porosity Mo exceeds 95%, the cooling capacity is rapidly lowered as the porosity Mo increases.

  Even in the case of the bulk density B having a small bulk density, in order to ensure the performance of 85% or more with respect to the maximum performance, the porosity Mo is in the range of 50% to 95% as shown in FIG. It is preferable that it is set within.

  Further, as shown in FIG. 14, in the characteristic diagram of the void ratio Mo and the coefficient of performance COP when the adsorbent packed layer thickness L is 4 mm, the void density A and the bulk density B are not affected. The coefficient of performance COP increases (improves) almost in proportion to the increase in the rate Mo. The coefficient of performance COP at which the increased porosity Mo reaches 95% is maximized, and in the region where the porosity Mo exceeds 98%, there is a risk that the coefficient of performance COP rapidly decreases as the porosity Mo increases. .

  Even in the case of the bulk density B having a small bulk density, in order to ensure a coefficient of performance COP of 0.5 or more, the porosity Mo should be set to 60% or more as shown in FIG. Is preferred.

  Furthermore, in order to maintain a state where the cooling capacity ratio and the coefficient of performance COP are high even when the adsorbent packed layer thickness L in the optimized range of the adsorbent packed layer thickness L is 4 mm. The porosity Mo is preferably set within the range of 60% to 95%.

  Furthermore, by setting the porosity Mo within the range of 70% to 95% (hereinafter referred to as the optimal range), when the thickness L of the adsorbent packed layer is in the optimized range. In addition, it is possible to reliably maintain a state where the cooling capacity ratio and the coefficient of performance COP are high.

  Next, the adsorption module 1 provided with the adsorption heat exchanger 2 integrally formed in the housing 3 will be described with reference to FIGS.

  The adsorption module 1 includes an adsorption heat exchanger 2 and a case 3 made of metal having a case main body 31, sheets 32 and 33, and tanks 34 and 35. In this embodiment, the metal of the housing is copper or a copper alloy.

  The housing body 31 is formed in a cylindrical shape, and is formed so that the porous heat transfer body 23 of the substantially cylindrical adsorption heat exchanger 2 can be accommodated therein. Moreover, the upper end side opening part and the lower end side opening part of the housing body 31 are formed so as to be capable of being sealed with sheets 32 and 33. An adsorbed medium inflow pipe 36 and an adsorbed medium outflow pipe 37 capable of guiding water vapor to the adsorbent packed bed of the adsorption heat exchanger 2 are provided on the upper portion of the housing body 31.

  By sealing the casing body 31 and the sheets 32 and 33 in this way, the inside can be maintained in a vacuum. As a result, in the internal sealed space formed by the housing body 31 and the sheets 32 and 33, there is only 1 Torr or less of other gas (gas phase refrigerant) other than water vapor as the adsorbed medium. ing.

  At the time of adsorption, the water vapor is distributed from the evaporator side to the adsorbed medium passage 25 through the adsorbed medium inflow pipe 36. The water vapor distributed to the adsorbed medium passage 25 penetrates into the adsorbent packed bed. Further, at the time of desorption, the water vapor is discharged from the adsorbent packed bed, and the discharged water vapor is guided to the condenser side from the adsorbed medium outflow pipe 37 through each adsorbed medium passage 25.

  The sheets 32 and 33 are formed with through holes 32a and 33a through which the heat medium pipe 21 can pass. The through holes 32a and 33a and the heat medium pipe 21 are airtightly fixed by joining by brazing or the like.

  The tanks 34 and 35 are provided with a heat medium inflow pipe 38 and a heat medium outflow pipe 39 capable of guiding the heat exchange medium. The heat exchange medium flows into the heat medium inflow pipe 38 of the lower tank 34, flows out of the heat medium outflow pipe 39 of the upper tank 35 through the heat medium pipe 21.

  The lower tank 34 and the upper tank 35 are tanks for supplying and distributing the heat exchange medium to the plurality of heat medium tubes 21.

  Note that the casing 3 and the heat medium pipe 21 may have any of a cylindrical shape, an elliptical shape, and a rectangular shape in the radial cross section.

  Next, the manufacturing process of the adsorption module 1 will be described with reference to FIG. The manufacturing process of the adsorption module 1 includes an assembly process (step S100) for assembling each component before the process of filling the metal powder 23b formed as a sintered body in the housing 3 and the adsorbent 24, and the housing. A filling step (step S200) for filling the body 3 with the metal powder 23b and the adsorbent 24, and a case formation for closing the filling port filled with the metal powder 23b and the adsorbent 24 to form the case 3 before brazing. A process (step S300) and a brazing process (step S400) for brazing the casing 3 before brazing into a furnace are provided.

  The assembly process in step S100 is a preparation process for the filling process of the metal powder 23b and the adsorbent 24 in step S200, and the components that can be assembled before filling the metal powder 23b and the adsorbent 24 are assembled as much as possible. It is preferable to attach it.

  In the assembly process of step S100, in order to hold and fix the heat medium pipe 21 which is a component of the adsorption heat exchanger 2 in the housing 3, first, one end of the plurality of heat medium pipes 21 is attached to the sheet 32. The sheet 32 and the heat medium pipe 21 are fixed by expanding (or expanding) the heat medium pipe 21 inserted into the through hole 32a. Next, the sheet 32 is assembled and fixed to the opening on the lower end side of the housing body 31. In this state, the upper end side opening of the housing body 31 is opened, and the heat medium pipe 21 is held and fixed in the housing body 31.

  In the casing main body 31, adjacent heat medium tubes 21 are provided at predetermined intervals, and the heat medium tube 21 has a peripheral portion 22 which is a space.

  Next, in the filling step in step S200, the casing main body 31 is filled with the metal powder 23b to be sintered on the peripheral portion 22 of the heat medium pipe 21 and the adsorbent 24 to be held. First, in the process of step S200, a jig (not shown) for providing the adsorbed medium passage 25 (hereinafter referred to as an adsorbed medium path jig) is inserted between the heat medium tubes 21. Next, the metal powder 23b and the adsorbent 24 are mixed from the upper end side opening where the sheet 33 of the housing body 31 is not assembled or from the communication hole connected to the adsorbed medium inflow pipe 36 and the adsorbed medium outflow pipe 37. Fill with stuff. As shown in FIG. 5, a predetermined amount of the mixture of the metal powder 23 b and the adsorbent 24 is filled in the peripheral portion 22 of the heat medium pipe 21.

  In the above-mentioned mixture of the metal powder 23b and the adsorbent 24, the above-mentioned optimum which requires the porosity Mo based on the filling volume Fv of the porous heat transfer body 23 formed by sintering and bonding the metal powder 23b. The amount of the metal powder 23b is adjusted so as to be within the range, and the amount is adjusted to the amount of the adsorbent 24 that can be filled in the gap corresponding to the amount of the metal powder 23b and the porosity Mo, and mixed in advance. And the peripheral part 22 is filled with the mixture by which the porosity Mo was set in the said optimal range.

  After a predetermined amount of the mixture of the metal powder 23b and the adsorbent 24 is filled, a predetermined pressure is applied from the upper part in FIG. 6 to solidify the mixture of the copper powder and the adsorbent 24.

  After the mixture of the metal powder 23b and the adsorbent 24 is hardened, the adsorption medium passage jig is wiped off to secure a hole (space) of the adsorption medium passage 25.

  The adsorbed medium passage 25 may be inserted with a jig that opens a hole in the adsorbed medium passage 25 at the same time when the metal powder 23b and the adsorbent 24 are filled and pressurized and hardened.

  Next, in the case forming process in step S300, all components that require brazing (joining) are assembled before the brazing process in S400. First, the sheet 33 is assembled and fixed in the upper end side opening of the housing body 31. In addition, the communication hole of the housing body 31 and the adsorbed medium inflow pipe 36 and the adsorbed medium outflow pipe 37 are assembled and fixed.

  Next, the lower tank 34 and the upper tank 35 are assembled and fixed to the sheets 32 and 33 or the housing body 31. Further, the heat medium inflow pipe 38 and the heat medium outflow pipe 39 are assembled and fixed to the lower tank 34 and the upper tank 35.

  Next, in the brazing process of step S400, the parts constituting the adsorption module 1 are brazed (joined), the metal powder 23b filled in step 200 is sintered, and the sintered body of the metal powder 23b. And the heat medium pipe 21 are sintered and bonded (joined), and the adsorbent 24 is fixed inside the sintered body (porous heat transfer body).

  First, it is placed on a component that requires brazing (joining). At least a joint part between the sheets 32 and 33 and the heat medium pipe 21 that is assembled and fixed through the sheets 32 and 33, a joint part between the sheets 32 and 33 and the housing body 31, and the sheet 32, Let's put it at the joint part of 33 and tanks 34 and 35.

  A copper material obtained by grading a brazing material may be used for the sheets 32 and 33 and the tanks 34 and 35. Thereby, the effort which is going to put on the said junction part can be saved.

  Moreover, since the sintering temperature of the copper powder as the metal powder 23b of this example is in the range of 700 ° C to 1000 ° C, the brazing material is melted in the range of 700 ° C to 1000 ° C. Use one with temperature. For example, the brazing material uses a copper-based or silver-based material. Further, since the adsorbent 24 is exposed to the high temperature atmosphere in the furnace, a material that is not destroyed at the furnace temperature (700 ° C. or higher) is used.

  In the present embodiment described above, the amount of the metal powder 23b is optimized by setting the porosity Mo in the range of 70% to 95%, so that the heat transfer characteristics can be improved, and the cooling capacity ratio and performance can be improved. The adsorption module 1 that keeps the coefficient COP always high can be provided.

  The amount of adsorbent is determined in accordance with the amount of the metal powder 23b set in the optimum range of the porosity Mo and the porosity Mo. At this time, it is preferable that the bulk density as a physical characteristic of the adsorbent 24 is 0.5 g / cc or more.

  As a result, the allowable cooling capacity ratio (0.85 or more of the maximum performance) and the coefficient of performance COP (0.5 or more) set in order to always maintain a high performance state depending on the degree of limiting the bulk density of the adsorbent 24. ) Can be reliably provided.

  In addition, it is preferable to set the optimal range of the said bulk density in the range of 0.5 g / cc-0.7 g / cc.

  In the present embodiment described above, it is preferable that the adsorbed medium passage 25 through which water vapor as the adsorbed medium flows is provided between the heat medium pipes 21. Thus, the adsorbed medium passage 25 plays a role of promptly penetrating into the porous heat transfer body 23 in the peripheral portion 22 of the heat medium pipe 21 through water vapor from the evaporator during adsorption, and during desorption, The water vapor discharged from the porous heat transfer body 23 in the peripheral portion 22 of the medium pipe 21 can play a role of promptly leading to the condenser in FIG. 4 through the adsorbed medium passage 25.

  Thus, by providing the to-be-adsorbed medium passage 25 between the heat medium pipes 21, it is possible to reduce the diffusion resistance of water vapor, and hence the adsorption rate and the desorption rate are improved.

  Even in the case where water vapor flows in from the upper part of the porous heat transfer body 23 in the adsorption module 1 as in the present embodiment, the target is located between the heat medium tubes 21 existing in the porous heat transfer body 23. Since the adsorption medium passage 25 can facilitate the flow of water vapor into the adsorbent 24 on the lower side of the porous heat transfer body 23, the diffusion resistance of the water vapor can be reliably reduced.

  Further, in the present embodiment described above, as a method of positioning the adsorbed medium passage 25 between the heat medium pipes 21, the heat medium pipe 21 is arranged so that the penetration depth r 2 and the heat transfer distance r 1 are substantially equal. It is preferable to arrange the adsorbed medium passage 25 between them. As a result, the adsorbed medium passage 25 is disposed between the heat medium pipes 21 so that the penetration depth r2 related to the adsorption and desorption speed is substantially equal to the heat transfer distance r1, so that the diffusion resistance of the adsorbed medium is reduced. It is possible to provide a high-performance adsorption heat exchanger that is small and has excellent heat transfer characteristics and can reduce the time required for adsorption and desorption.

  In the present embodiment described above, it is preferable that the thickness L of the adsorbent packed layer is set in a range of 0.5 mm to 6 mm. This is because the cooling performance from the maximum performance to 70% can be secured. Furthermore, it is desirable to set the thickness L of the adsorbent packed layer within the range of 1 mm to 4 mm (hereinafter, the optimum range of the adsorbent packed layer thickness L). This is because the cooling performance from the maximum performance to 85% can be secured.

  Thereby, compared with the case where the thickness L of the adsorbent packed layer is not optimized, a higher performance adsorption module can be provided.

  Further, in the present embodiment described above, the adsorbed medium passage 25 is arranged in parallel to the heat medium pipe 21, and water vapor passes through the adsorbed medium passage 25 in one direction (from the upper direction to the lower direction in FIG. 5). Inflow is possible. Thereby, it becomes easy to arrange the to-be-adsorbed medium passage 25 between the heat medium pipes 21 so that the penetration depth r2 related to the adsorption and desorption speed is substantially equal to the heat transfer distance r1.

  Further, in the present embodiment described above, the adsorption heat exchanger 2 described above and the casing 3 capable of holding the porous heat transfer body 23 and the adsorbed medium passage 25 of the adsorption heat exchanger 2 in a vacuum are provided. The adsorption module 1 has a casing 3 that is configured to enclose water vapor therein and to couple the external evaporator and condenser to the adsorbed medium in a flowable manner. During adsorption, water vapor flows from the evaporator side into the adsorbent packed bed, and when desorbed, water vapor discharged from the adsorbent packed bed flows out to the condenser side.

  Since it is configured to guide water vapor to a separately provided evaporator and condenser at the time of adsorption and desorption, the evaporator and the condenser do not generate waste energy at the time of desorption and adsorption. .

  In the present embodiment described above, the porous heat transfer body 23 is a sintered body formed by sintering from copper or copper alloy metal powder, and the metal powder forms a sintered body. The heat medium pipe 21 existing in the peripheral portion 22 is preferably made of copper or a copper alloy.

  According to this, since the porous heat transfer body 23 having excellent heat transfer characteristics and the heat medium pipe 21 are sinter-bonded, they can be joined not only in contact but also in a metallic manner, thereby improving heat transfer. Can be planned.

  Further, the housing 3 is configured such that the internal accommodation space is partitioned by a plurality of members 31, 32, 33, 34, and 35 brazed to each other by a brazing material, and the metal powder 23b is sintered. It is preferable that the temperature is the same as the brazing temperature of the brazing material.

  As a result, the joining of the constituent members such as the housing 3 constituting the adsorption module 1 with the brazing material and the formation of the porous heat transfer body (23) by the sintering of the metal powder 23b are brazed once in the furnace. Since it can be carried out simultaneously by heating by temperature, an adsorption module capable of achieving excellent productivity can be provided.

  Thus, a step of sintering metal powder on the peripheral portion 22 of the heat medium pipe 21, a step of allowing the adsorbent 24 to exert an adsorbing action, and a step of brazing and joining the components constituting the adsorption module 1 together. Since it is carried out by the brazing process, an efficient manufacturing method with a reduced number of manufacturing processes can be provided. Therefore, the manufacturing process can be simplified and the cost of the adsorption module can be reduced by reducing the diffusion resistance of the medium to be adsorbed and integrally forming it.

  Moreover, in this embodiment demonstrated above, in the manufacturing method of the adsorption module 1, the assembly | attachment process which arrange | positions the heat medium pipe | tube 21 by arrange | positioning inside the housing | casing 3, and the peripheral part of the heat medium pipe | tube 21 in the housing | casing 3 And filling the metal powder 23b so that the porosity Mo formed by sintering the metal powder 23b as a sintered body is in the range of 70% to 95%. It is preferable to provide a process.

  Accordingly, at least the metal powder 23b is positioned in the peripheral portion 22 of the heat medium pipe 21, and the porosity Mo of the porous heat transfer body 23 formed by sintering the metal powder 23b as a sintered body is set to 70%. Since the filling step of filling the metal powder 23b so as to be in the range of ˜95% is provided, the heat transfer characteristics can be improved, and the adsorption module 1 in which the performance and the coefficient of performance COP are always kept high is obtained. A method for manufacturing an adsorption module can be provided.

  Further, as a subsequent step of the filling step, a case forming process before brazing in which the filling port containing the metal powder 23b and the adsorbent 24 in the filling step is closed to form a case before brazing, By heating the case before being put in a furnace and heating the metal powder 23b to form the porous heat transfer body 23, the heat medium tube 21 and the case 3 are joined by brazing. It is preferable to further include a brazing step.

As a result, the step of sintering the metal powder 23b on the peripheral portion 22 of the heat medium pipe 21, the step of bringing the adsorbent 24 into a state where it can exert the adsorbing action, and the step of brazing and joining the components constituting the adsorption module 1 Is implemented by a brazing process, and thus an efficient manufacturing method with a reduced number of manufacturing processes can be provided.

Further, in the present embodiment described above, in the manufacturing method in the case of the adsorption module 1 including the adsorbed medium passage 25 disposed between the heat medium tubes 21, the adsorbed medium passage 25 is provided in the filling step. It is preferable that the adsorption medium passage jig is disposed between the heat medium pipes 21.

  According to this, the hole (space) of the adsorbed medium passage 25 is simply inserted into the adsorbent medium passage jig into the mixture of the metal powder and adsorbent 24 mixed in the peripheral portion 22 of the heat medium pipe 21. Can be secured.

  In the embodiment described above, the melting temperature of the brazing material used for brazing and joining in the brazing step is preferably in the range of 700 to 1000 ° C.

  According to this, since the range of 700 to 1000 ° C. is the temperature at which the copper powder 23b is sintered, the brazing and sintering are simultaneously performed by passing the casing 3 before brazing once through the furnace. be able to.

(Second Embodiment)
A second embodiment of the present invention is shown in FIG. The second embodiment is applied to an adsorption heat exchanger 102 having a flat heat medium pipe 121. FIG. 16 is a view showing the adsorption heat exchanger in the present embodiment, in which FIG. 16 (a) is a perspective sectional view, and FIG. 16 (b) is an enlarged view of FIG. 16 (a).

  When the heat medium pipe 121 has a flat cross section, as shown in FIG. 16B, the heat transfer distance r1 is a distance from the long side of the flat cross section. This is because in the flat heat medium pipe 121, heat is mainly transferred from the long side of the flat cross section.

  Further, as in the present embodiment, in the case where the porous heat transfer body 23 is formed in the peripheral portion 122 although the plurality of heat medium tubes 121 are arranged at predetermined intervals so as to extend in the long side direction, Between the peripheral portion 122 extending in the left-right direction in FIG. 16A and the peripheral portion 122 adjacent to the peripheral portion 122 in the up-down direction in the figure, a suctioned medium passage 125 that is flat in the left-right direction is disposed. did. That is, in the case where a plurality of peripheral portions 122 extending in the left-right direction are provided in the housing 103, a suction target medium passage 125 that is flat in the left-right direction is provided between the peripheral portions 122, so The medium passages 125 are alternately arranged in the vertical direction.

  In the case of the peripheral portion 122 and the adsorbed medium passage 125 as described above, the penetration depth r2 and the heat transfer distance r1 can be defined as shown in FIG. That is, the thickness L of the adsorbent packed bed is set to the distance from the long side of the flat heat medium pipe 121 to the inner peripheral surface of the flat adsorbed medium passage 125. At this time, the penetration depth r2 and the heat transfer distance r1 are always substantially equal.

(Third embodiment)
A third embodiment of the present invention is shown in FIG. The third embodiment is another example applied to the adsorption heat exchanger 202 having the flat heat medium pipe 121. FIG. 17 is a view showing an adsorption heat exchanger according to the present embodiment, in which FIG. 17A is a perspective sectional view, and FIG. 17B is an enlarged view of FIG.

  In the present embodiment, the plurality of heat medium tubes 121 are arranged such that the long sides of the adjacent heat medium tubes 121 face each other with a predetermined interval. The porous heat transfer body 23 is formed at the peripheral portion 222 of such a plurality of heat medium tubes 121 arranged so that the adjacent long sides face each other with a predetermined interval. As shown in FIG. 17A, the peripheral portion 222 extends in the vertical direction in the figure.

  The adsorbed medium passage 225 is disposed between a peripheral part 222 extending in the vertical direction in FIG. 17A and a peripheral part 222 adjacent to the peripheral part 122 in the horizontal direction in the figure, and is in the vertical direction. It has a flat passage shape.

  In the case of the peripheral portion 222 and the adsorbed medium passage 225, the penetration depth r2 and the heat transfer distance r1 are defined as shown in FIG. In setting the thickness L of the adsorbent packed layer, it is preferable to set the long sides of the heat medium pipe 121 so that the predetermined interval is equal to the width of the peripheral portion 222. Thereby, the penetration depth r2 and the heat transfer distance r1 are substantially equal.

(Other embodiments)
As mentioned above, although one Embodiment of this invention was described, this invention is limited to this embodiment and is not interpreted and can be applied to various embodiment in the range which does not deviate from the summary.

  (1) In the present embodiment described above, in the adsorption heat exchanger 2 constituting the adsorption module 1, the adsorbent passage 25 is provided between the heat medium tubes, but the adsorption heat exchanger 2 is a heat medium. The adsorbent passage 25 is not limited to the one having the adsorbent passage 25 disposed between the pipes, and may not have such an adsorbent passage.

  (2) In the present embodiment described above, in the manufacturing process related to the manufacturing method of the adsorption module 1, the amount of the metal powder 23b is adjusted so that the porosity Mo falls within the above optimal range, and the amount and the porosity Mo It was assumed that the adsorbent 24 that can be filled in the corresponding gap portion was mixed and the mixture in which these were premixed was filled in the peripheral portion 22 of the heat medium pipe 21 in the filling step.

  The manufacturing method of the adsorption module 1 is not limited to such a method, and in the filling step (step S220 in FIG. 22), the porosity Mo is adjusted to the amount of the metal powder 23b within the optimum range, Only the metal powder 23 b may be filled in the peripheral portion 22 of the heat medium pipe 21. In this case, after the metal powder 23b and the heat medium tube 21 are sinter-bonded, the void portion including the pores 23a of the porous heat transfer body 23 formed as a sintered body can be filled into the void portion. The amount of agent 24 is filled.

  As a method of filling the gap with the adsorbent 24 after the above-described metal powder 23b and the heat medium pipe 21 are sintered and bonded, as shown in FIG. 22, after the brazing process of step S400 is completed, the adsorbent 24 is filled. Step (S520) of fixing the inside of the sintered body (porous heat transfer body) is performed. In the adsorbent filling step of step S520, the adsorbent slurry (liquid) in which the adsorbent 24 is dispersed in the dispersion basket is introduced from the adsorbed medium inflow pipe 36 or the adsorbed medium outflow pipe 37, and the porous heat transfer body 23 is obtained. The adsorbent 24 is filled in the pores 23a. Thereafter, when the adsorbent slurry is dried, the adsorbent slurry is fixed inside the porous heat transfer body 23, and the adsorbent 24 can be brought into a state capable of exhibiting an adsorbing action.

  Thereby, a uniform adsorbent packed layer can be easily formed on the heat transfer surface inside the porous heat transfer body 23. Moreover, in order to put the adsorbent 24 into the furnace in a state where it is filled, the adsorbent 24 needs to have heat resistance. However, since the adsorbent 24 is filled after the porous heat transfer body 23 is formed, the adsorbent 24 having no heat resistance is used. Even so, the manufacturing method of the present embodiment can be applied.

  By adopting such a manufacturing method of the adsorption module 1, the process of sintering the metal powder 23 b on the peripheral portion 22 of the heat medium pipe 21 and the process of brazing and joining the parts constituting the adsorption module 1 are performed. Since it implements by an attaching process, the efficient manufacturing method which reduced the number of manufacturing processes can be provided. Furthermore, the adsorbent filling step of adding the adsorbent 24, which is dispersed in a dispersion rod and made into an adsorbent slurry, into the pores 23a of the porous heat transfer body 23 formed in the brazing step, is added. It can be in the state where the agent 24 can exhibit the adsorption action.

  (3) In the present embodiment described above, the heat medium pipe and the housing are cylindrical in the radial direction in the first embodiment and rectangular in the second and third embodiments. The casing may have any shape such as a cylindrical shape, an elliptical shape, or a rectangular shape in its radial cross section.

  (4) In the first embodiment described above, the cross section of the adsorbed medium passage 25 is circular, but may be rectangular as shown in FIG. In this case, the peripheral portion 422 has a shape extending in the left-right direction in the figure, and a plurality of heat medium tubes 21 are arranged in a row at predetermined intervals in the left-right direction in the peripheral portion 422. The adsorbed medium passage 125 is disposed between a peripheral portion 422 extending in the left-right direction and the peripheral portion 422.

  (5) In the peripheral portion 422, the plurality of heat medium tubes 21 are arranged in a row at predetermined intervals in the left-right direction. However, as shown in FIG. You may arrange in a row. In this case, a slit-like adsorbed medium passage 325 extending in the left-right direction is disposed between the rows of the heat medium tubes 21.

  (6) In the first embodiment described above, the adsorbed medium passage 25 is arranged in the area surrounded by the three heat medium pipes 21, but the area surrounded by the four heat medium pipes 21 shown in FIG. 20. It may be arranged in a region, or may be arranged in a region surrounded by a plurality of heat medium tubes 21 such as four, five, or six.

  (7) The adsorbed medium passage 25 (see FIGS. 2 and 20) is disposed in a region surrounded by the plurality of heat medium pipes 21, but the inner diameter of the adsorbed medium passage 25 is as follows. Any size is acceptable as long as the adsorbed medium (water vapor) can be quickly distributed and supplied to the adsorbent packed bed.

  (8) Although the adsorbed medium passage 25 has a circular cross section, the adsorbed medium passage 625 may have a substantially triangular shape as shown in FIG. This makes it easier to dispose the adsorbed medium passage between the heat medium tubes so that the penetration depth r2 and the heat transfer distance r1 are substantially equal.

It is a figure which shows the adsorption heat exchanger concerning 1st Embodiment of this invention, Comprising: Fig.1 (a) is sectional drawing, FIG.1 (b) is sectional drawing seen from IB in Fig.1 (a). It is an enlarged view of Fig.1 (a). FIG. 3 is a schematic cross-sectional view showing an adsorbent packed layer in FIG. 2. It is an external view which shows the adsorption | suction module of 1st Embodiment of this invention. It is sectional drawing seen from V in FIG. It is sectional drawing seen from VI in FIG. It is a characteristic view showing the relationship between the thickness L of the adsorbent packed bed and the cooling performance per unit volume. It is a characteristic view which shows the relationship between the thickness L of an adsorption agent filling layer, and adsorption capability. It is a schematic diagram explaining the porosity in the space | gap part containing the pore in the adsorption agent filling layer in FIG. It is a characteristic view which shows the relationship between the porosity and the packing density of adsorbent. It is a figure explaining the relationship between a porosity and cooling performance, Comprising: It is a characteristic view which shows an example in case the thickness L of an adsorption agent filling layer is 2 mm. It is a figure explaining the relationship between the porosity and a coefficient of performance COP, Comprising: It is a characteristic view which shows an example in case the thickness L of an adsorption agent filling layer is 2 mm. It is a figure explaining the relationship between a porosity and cooling performance, Comprising: It is a characteristic view which shows another example in case the thickness L of an adsorption agent filling layer is 4 mm. It is a figure explaining the relationship between a porosity and a coefficient of performance COP, Comprising: It is a characteristic view which shows another example in case the thickness L of an adsorption agent filling layer is 4 mm. It is a flowchart which shows a manufacturing process about the manufacturing method of the adsorption module of 1st Embodiment. It is a figure which shows the adsorption heat exchanger in 2nd Embodiment, Comprising: Fig.16 (a) is a perspective sectional view, FIG.16 (b) is an enlarged view of Fig.16 (a). It is a figure which shows the adsorption heat exchanger in 3rd Embodiment, Comprising: Fig.17 (a) is a perspective sectional view, FIG.17 (b) is an enlarged view of Fig.17 (a). It is a perspective sectional view showing an adsorption heat exchanger in other embodiments. It is a perspective sectional view showing an adsorption heat exchanger in other embodiments. It is a perspective sectional view showing an adsorption heat exchanger in other embodiments. It is a perspective sectional view showing an adsorption heat exchanger in other embodiments. It is a flowchart which shows a manufacturing process about the manufacturing method of the adsorption module of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Adsorption module 2 Adsorption heat exchanger 21 Heat medium pipe 22 Peripheral part 23 Porous heat transfer body (porous sintered fin, sintered body)
24 Adsorbent 25 Adsorbed medium (water vapor) passage 3 Housing 31 Housing body 32, 33 Sheet 32a, 33a Through hole 34 Lower tank (tank)
35 Upper tank

Claims (6)

A porous heat transfer body (23) having a plurality of heat medium tubes (21) through which a heat exchange medium flows, and having pores (23a) in the periphery (22) of the heat medium tubes (21), and an adsorbent An adsorption module (1) provided with (24),
The porous heat transfer body (23) is formed by metal-bonding any one of powdered, particulate, and fibrous metal powder (23b) to the heat medium pipe (21) by sintering,
The adsorbent (24) is filled in the pores (23a) formed in the porous heat transfer body (23),
The thickness (L) of the adsorbent packed bed in which the adsorbent (24) is filled in the peripheral portion (22) of the heat medium pipe (21) is set in a range of 0.5 mm to 6 mm,
The heat transfer medium pipe (21) and the porous heat transfer body (23) metal-bonded to the peripheral part (22) of the heat transfer medium pipe (21) include a void portion including the pores (23a). Have
The porosity Mo of the void portion is
The weight of the metal powder (23b) filled in the peripheral part (22) is Mg, the filling volume of the peripheral part (22) filled with the metal powder (23b) is Fv, and the metal powder (23b) Is represented by Mo = (1-Mg / (Fv × ρ)),
The porosity Mo is set in a range of 70% to 95% ,
The adsorption module (1) includes an adsorbed medium passage (25) through which an adsorbed medium flows,
The adsorbed medium passage (25) is disposed between the heat medium pipes (21),
Penetration depth at which the adsorbed medium penetrates toward the heat medium pipe (21) from the inner peripheral surface of the adsorbed medium passage (25) to the outer peripheral surface of the adjacent heat medium pipe (21). (R2)
The distance from the heat medium pipe (21) in the thickness of the adsorbent packed layer as a heat transfer distance (r1),
The adsorbed medium passage (25) is disposed between the heat medium pipes (21) so that the penetration depth (r2) and the heat transfer distance (r1) are substantially equal. Adsorption module. The heat medium pipe (121) is formed in a flat cross section,
The distance from the long sides of the flat cross section of the heat medium pipe (121) and the heat transfer distance (r1),
The penetration depth (r2) through which the adsorbed medium penetrates from the inner peripheral surface of the adsorbed medium passage (125) toward the heat medium pipe (121) is substantially equal to the heat transfer distance (r1). The adsorption module according to claim 1 , wherein the adsorption medium passage (125) is disposed between the heat medium pipes (121). Wherein the adsorbed medium passage (25) is arranged parallel to the heat medium pipe (21), wherein according to claim 1 or claim 2 the adsorption medium is characterized in that it is flowing from at least one direction Adsorption module. The adsorption module (1) according to any one of claims 1 to 3 ,
A housing (3) capable of holding at least the porous heat transfer body (23) in a vacuum;
The casing (3) is configured to enclose the medium to be adsorbed therein and to connect the external evaporator and condenser and the medium to be adsorbed so as to be able to flow. An adsorption module, wherein the adsorbed medium flows in and the adsorbed medium flows out toward the condenser when desorbing. The metal powder (23b) of the porous heat transfer body (23) is copper or a copper alloy,
The adsorption module according to any one of claims 1 to 4 , wherein the heat medium pipe (21) is made of copper or a copper alloy. The housing (3) is configured so that an internal housing space is partitioned by a plurality of members (31, 32, 33, 34, 35) brazed to each other by a brazing material,
The said metal powder (23b) is comprised so that the said sintering temperature may be made into the same temperature as the brazing temperature of the said brazing material, It is any one of Claims 1-5 characterized by the above-mentioned. Adsorption module.

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